Commit 96a2aea

Fix darwin build (#190)

This modifies the build so the flake builds correctly on darwin.

`nix flake show` still creates an IFD in the zig2nix flake, but that was
a problem before and could be solved by setting pname and version in the
package - so nothing that got worse with this patch.

 1@@ -10,7 +10,7 @@
 2     let
 3       flake-utils = zig2nix.inputs.flake-utils;
 4     in
 5-    (flake-utils.lib.eachSystem [ "x86_64-linux" "aarch64-linux" ] (
 6+    (flake-utils.lib.eachSystem [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ] (
 7       system:
 8       let
 9         env = zig2nix.outputs.zig-env.${system} {
10@@ -20,11 +20,30 @@
11       with builtins;
12       with env.pkgs.lib;
13       let
14-        zmx-package = env.package {
15-          src = cleanSource ./.;
16-          zigBuildFlags = [ "-Doptimize=ReleaseSafe" ];
17-          zigPreferMusl = true;
18-        };
19+        isDarwin = env.pkgs.stdenv.hostPlatform.isDarwin;
20+        sdkRoot = env.pkgs.apple-sdk.sdkroot;
21+        xcrunWrapper = env.pkgs.writeShellScriptBin "xcrun" ''
22+          echo "${sdkRoot}"
23+        '';
24+        xcodeselectWrapper = env.pkgs.writeShellScriptBin "xcode-select" ''
25+          echo "${sdkRoot}"
26+        '';
27+
28+        zmx-package = env.package (
29+          {
30+            src = cleanSource ./.;
31+            zigBuildFlags = [ "-Doptimize=ReleaseSafe" ];
32+            zigPreferMusl = !isDarwin;
33+          }
34+          // optionalAttrs isDarwin {
35+            glibc = null;
36+            musl = null;
37+            nativeBuildInputs = [
38+              xcrunWrapper
39+              xcodeselectWrapper
40+            ];
41+          }
42+        );
43       in
44       {
45         packages = {